Manufacture of yarn



Patented Jan. 13, 1931 UNITED STATES PATENT OFFICE WALLAGE HENRY PAULL AND REGINALD TRUESDALE, OF FORT DUNLOP, BIRMING- HAM, ENGLAND, ASSIGNORS TO DUNLO]? TIRE AND RUBBER CORPORATION OF AMERICA, OE BUFFALO, NEW YORK, A CORPORATION OE NEW YORK MANUFACTURE OF YARN No Drawing. Application filed October 27, 1926, Serial No. 144,642, and in Great Britain November ing appearance and finish.

According to this invention we produce a yarn bymixing ramie or rhea fiber with artificial silk fiber prepared by any of the known processes, for example, the viscose, cellulose acetate, cupro-ammonimum or nitro-cellulose processes.

The yarn may be produced by mixing in suitable proportion and spinning together the natural ramie or rhea. fiber and the artificial silk fiber. Y

The proportions in which the fibers are mixed depends on the purpose for which they are required. A yarn for use in cord fabric for tires may consistof approximately 75% rzliomie or rhea fiber and 25% artificial silk fi er.

The yarn may also be produced by spinning the artificial silk fibers and the ramie fibers together separately into thread and then doubling the threads together in suitable proportions, which may, for example, be the roportions indicated above.

It w' 1 be apparent that the practiceof the invention does not necessarily demand the utilization of any special or particular kind of apparatus, it being understood that standard textile machinery may be used to carry out all the required steps of the process of the said invention.

The ramie or rhea fiber is of great strength but lacks flexibility whereas the artificial silk fiber'is extremely flexible but relatively weak. A mixture of the two in suitable proportions is extremely suitable for our purpose.

By thus combining the artificial silk' or rayon and ramie fibers and spinning them tomore durable and better wearing the structure. 1

Having now particularly described and as certained the nature of our said invention and in what manner the same is to. be per formed we declare that what we claim is:

1. A cord tir for vehicle wheels having cords composed of fibrous ramie and artificial silk.

2. A cord tire for vehicle wheels having cords composed of about 75% of ramie fibres and 25% artificial silk fibres.

3. A cord tire for vehicle wheels having cords composed of spun and twisted fibers of ramie and artificial silk embedded therein.

In witness whereof, we have hereunto signed our names.

WALLACE HENRY PAULL. REGINALD TRUESDALE.

gether into thread and doubling, a'cord will be obtained that has a resistanceto fatigue much greater than'that of other fibers heretofore available and which, therefore, forms with the rubber in which it is embedded a 

